You are comparing him to who? the likes of Frattin and Ashton. He has 10 times the talent, in half their size.
To everyone else who played with or against him when he was on the ice in the games he got into. He wasn't good enough. His size did him no favours, and he really did not show the talent that you claim to see. He's an AHL calibre player - a good one, but, still AHL calibre.
And his big attribute was his speed on the PK. Bozak is there for his face off ability. Holland has shown he can be adept there too. Komarov is likely our best PKer and between Santorelli, Booth, JVR, even Kadri there really isn't a need for him.
He was a nice preseason story and nothing more.
But Kozun doesn't have to be better than JVR and Kadri. If everybody's healthy, we have:
JVR - Boz - Phil
Lupul - Kadri - Clarkson
Komarov - Holland - Winnik
Booth - Santorelli -

That final spot would be Kozun, Panik, or I guess Leivo.... you don't think Kozun has any shot?